Why is it that bulimia sometimes actually cause weight loss?

Bulimia does not actually cause weight loss. People with bulimia binge and purge, which means they consume large amounts of food in a short period of time and then purge the food by vomiting, using laxatives, or exercising excessively. This can lead to dehydration and malnutrition, which can cause weight loss. However, people with bulimia are still consuming large amounts of food during their binges, so they may not actually lose weight in the long term. Additionally, the purging behavior associated with bulimia can cause other health problems, such as electrolyte imbalances, dehydration, and damage to the teeth, throat, and esophagus.